کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5190236 | 1381201 | 2006 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Solid-state polycondensation of natural aldopentoses and 6-deoxyaldohexoses. Facile preparation of highly branched polysaccharide
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موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آلی
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Solid-state polycondensation of natural aldopentoses and 6-deoxyaldohexoses was found to take place in the presence of H3PO4 (5 mol%) at 100-110 °C under a N2 flow, giving highly branched polysaccharide (Conv. 47-81%, Mw=2700-12â000, Mn=1400-2900); the reaction mixtures were powdery throughout the polymerization. The product polysaccharide was per-O-methylated and subjected to the structure analyses. The acid-hydrolysis, which gave a variety of the partially O-methylated monosaccharides, suggested that the product polysaccharides proved to have highly branched structures consisting of both furanose and pyranose units. MALDI-TOF mass analysis revealed that the 1,4-anhydride terminal unit was formed and participated to the polymerization.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Polymer - Volume 47, Issue 1, 3 January 2006, Pages 176-183
Journal: Polymer - Volume 47, Issue 1, 3 January 2006, Pages 176-183
نویسندگان
Atsushi Kanazawa, Masato Suzuki,